Why is he on additional pain relief (ie tramadol or vetergesic)? I've only been given those after major jaw surgery. I usually get permission to increase the metacam for a few days.
Was he weighed again? It's useful to weigh weekly just to keep track of his general condition and food intake.
It's a long way off until your vet is on holiday. Fingers crossed Ian is feeling much better by then, even if you are still having to provide some additional support.
She thinks the reasons he's not chewing/takes a very long time to chew when he does is because of pain from a tooth infection, and because we saw a change from yesterday to this morning when he came of the vetergesic she said to try tramadol (0.1 ml twice a day). I'd already upped his metacam to 0.5 last night and this morning (based on a previous dosage he'd had post surgery) and he seemed less alert and less interested in food this morning and just looked uncomfortable. We've upped the metacam to 0.5 twice a day going forward too but she didn't want to up it too much because of something to do with it and dehydration. He was weighed and was 1.82ish compared to 1.85 last week so not a big change. I'm going to buy some baby scales to weigh him going forward because our method of putting him in a big bowl on our kitchen scales is probably a bit stressful for him at the moment and probably not as accurate.
Our vets last day in is this Thursday so she said I can contact her on that day if I need to but otherwise she told me one of the newer vets has a rabbit himself and has an interest so I might try him if I need to go back while she's gone.
He's had a tiny nibble on some dandelion leaf this evening (I put it right to his mouth and he went to nudge it away then nibbled a bit, so not incredibly enthusiastically but did have a bit).